package com.example.bijidemo.Aop;
import com.example.bijidemo.common.BaseContext;
import com.example.bijidemo.common.SysLog;
import com.example.bijidemo.entity.SysLogEntity;
import com.example.bijidemo.service.SysLogService;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Date;
/**
 * 系统日志，切面处理类
 *
 * @author lincheng
 */
@Aspect
@Component
public class SysLogAspect {
    @Autowired
    private SysLogService sysLogService;

    //定义切点 切点表达式指向SysLog注解，我们再业务方法上可以加上SysLog注解，然后所标注
    //的方法都能进行日志记录
    @Pointcut("@annotation(com.example.bijidemo.common.SysLog)")
    public void logPointCut() {

    }

    @Around("logPointCut()")
    public Object around(ProceedingJoinPoint point) throws Throwable {
        long beginTime = System.currentTimeMillis();
        //执行方法
        Object result = point.proceed();
        //执行时长(毫秒)
        long time = System.currentTimeMillis() - beginTime;

        //保存日志
        saveSysLog(point, time);

        return result;
    }

    private void saveSysLog(ProceedingJoinPoint joinPoint, long time) {
        //获取加入注解上的类
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        Method method = signature.getMethod();

        SysLogEntity sysLog = new SysLogEntity();
        //判断这个方法时尚是否可以拿到这个注解
        SysLog syslog = method.getAnnotation(SysLog.class);
        if(syslog != null){
            //注解上的描述
            sysLog.setOperation(syslog.value());
        }

        //获取哪个用户进行的操作的
        String name = BaseContext.getCurrentName();
        sysLog.setUsername(name);




        //请求的方法名

        //获取相关对象的信息
        String className = joinPoint.getTarget().getClass().getName();
        //获取相关方法的信息
        String methodName = signature.getName();
        sysLog.setMethod(className + "." + methodName + "()");

        //请求的参数
        Object[] args = joinPoint.getArgs();
        try{
            String params = Arrays.toString(args);
            sysLog.setParams(params);
        }catch (Exception e){

        }

        //获取request
        HttpServletRequest request = HttpContextUtils.getHttpServletRequest();
        //设置IP地址
        sysLog.setIp(IPUtils.getIpAddr(request));

        sysLog.setTime(time);
        sysLog.setCreateDate(new Date());
        //保存系统日志
        sysLogService.save(sysLog);
    }
}
